Fan having a sensor

A fan having at least one sensor (86;

• 186) for sensing at least one value of the air that flows through the fan (20;
• 120), said fan comprising:
• a fan housing (22, 24;
• 122, 124) having an air inlet opening (58;
• 158) and an air outlet opening (60;
• 160);
• an electronically commutated external-rotor motor, arranged in that fan housing (22, 24;
• 122, 124), which motor has an internal stator (30;
• 130) and an external rotor (46;
• 146);
• a fan wheel (56;
• 156) coupled to the external rotor (46;
• 146), serving to pull air in through said air inlet opening (58;
• 158) and to exhaust said air through said air outlet opening (60;
• 160);
• a circuit board having a first portion (66, 88;
• 188) and having
• conductors (82, 84:
• 182′, 182″) arranged on that first portion, said first portion (66,88;
• 188) having an outer portion (66;
• 185) located outside of the air inlet opening and a support part(88;
• 188) extending from the outer portion (66;
• 185) into the region of the air inlet opening (58;
• 158),
• said conductors (82,84;
• 182′, 182″) extending from the outer portion to the support part (88;
• 188) and
• said sensor (86;
• 186) being supported by said support part (88;
• 188) and being connected to the conductors (82,84;
• 182′, 182″),
• wherein there is provided, in the region of the air inlet opening (158), a collar (159) through which the first portion (188) of the circuit board (185) extends into the air inlet opening (158).

A fan having at least one sensor (86;

• 186) for sensing at least one value of the air that flows through the fan (20;
• 120), said fan comprising:
• a fan housing (22, 24;
• 122, 124) having an air inlet opening (58;
• 158) and an air outlet opening (60;
• 160);
• an electronically commutated external-rotor motor, arranged in that fan housing (22, 24;
• 122, 124), which motor has an internal stator (30;
• 130) having at least one stator coil (136, 138) and an external rotor (46;
• 146);
• an air passage opening (58;
• 90;
• 158) for passage of air that is to be moved by a wheel (56;
• 156) of the fan;
• a first circuit board (68;
• 185) having a first portion (66, 88;
• 188) that extends in a region of the air passage opening (58;
• 158), said first portion comprising conductors and contact holes (183′, 183″),
• the sensor (86;
• 186) being connected to the conductors, said conductors leading to the contact holes (183′, 183″);
• a contact array located on the fan housing and including a plurality of contacts (K1-K6) which transition, at free ends thereof, into solder lugs (176) adapted for connection to conductors of a second circuit board, part of said plurality of contacts being connected electrically to said at least one stator coil (136, 138), others of said contacts being directly soldered to the contact holes and being connected electrically to said conductors (82, 84;
• 182′, 182″) arranged on said first portion (66, 88;
• 188) for electrically connecting said sensor (86;
• 186) to solder lugs (176) associated with said sensor (86;
• 186).